PHYS 1750: SELECTED TOPICS in PHYSICS
LECTURE 19. Fluids: Some Principles.

10.5.	Pascal's Principle
	1.	Pressure is transmitted throughout the fluid (equal on horizontal surfaces)
	2.	Hydraulic lifts
10.6.	Gauge Pressure: Pabs = Pgauge + Patm
10.7.	Archimedes and Buoyant Forces
	1.	Bouyant force = weight of displaced fluid
	2.	Submerged objects
		a.	Net force = m'g = mg - mwg = ρVg - ρwVg = (ρ - ρw)Vg
		b.	Sinking vs. floating
		c.	Measuring density of object m:
			Knowns: mg - m'g = mwg Unknown: V But: mw = ρwV so V = (m - m') /ρw
			ρ = m/V = ρw m / (m - m')
	3.	Floating objects: sink to hydrostatic pressure ρAhg = ρwAdg, where d = depth

Review Questions
Lecture 20: Fluid Dynamics